— Is it helpful to study with a group?

— Yes, I think so. ____________, I’ve learnt a lot.

A．By this way

B．In this way

C．On the way

D．With the way

往复泵特别适用于小流量、（）的情况下输送粘性较大的液体。

A.高扬程

B.低扬程

C.高效率

D.低效率